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Steve installed the Comp Cams pushrod length checker tool (PN 7702-01). Steve applied dye to the top of the intake and exhaust valve stem where the Comp Cams roller rockers (PN 1605-16) contact them. Steve then rotated the motor so that the rocker was pressing the valve half way down. If the pushrod length checker tool is adjusted correctly the rocker will be in the middle of the valve. Then the motor was rotated until the valve was all the way down and the rocker was at full travel. At this point the rocker should be making contact toward the intake side of the valve. Notice the red dye has a grove from the rocker being cycled and the end goal of selecting the correct pushrod length is for the rocker to make contact towards the center of the valve, and not off to one side.